Great Circle Associates Firewalls
(November 1994)
 

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Subject: Re: promiscuous mode on ethernet card-question.
From: z056716 @ uprc . com (LaCoursiere J. D. (Jeff))
Date: Thu, 17 Nov 1994 08:04:27 +0600
To: jason @ dickory . SDSU . Edu
Cc: firewalls @ greatcircle . com

> 
> > Can a PC running a sniffer that sets the ethernet card to
> > promiscous mode be detected by same? Or other methods?
> > 
> > Our students are getting more "educated."  :(
> 
> These sounds like it's good for your students and bad for you.
> I do not think it possible to detect a remote machine snarfing packets.
> 
> There is not much you can do. MS-DOG, I mean DOS, has no concept of 
> permissions. You can make small isolated subnets and threaten users with 
> stiff penalties for sniffing. In the end you will probably have to chalk 
> that subnet up as being insecure unless someone has a better solution.
> 

Ahh, but there is something you can do.  Use smart hubs.

j

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